To connect to Nintendo Wi-Fi Connection with your Nintendo DS, you need the following:
With a Wi-Fi compatible game inserted into your Nintendo DS, access the Nintendo Wi-Fi Connection Settings screen. Your game manual provides information on how to do this for the game you are playing.
At this point, you have a few different connection options. The easiest way to get connected to Nintendo's Wi-Fi Connection is through the Auto Search function of the Nintendo DS. We highly recommend this method.
If you're not sure if you have a wireless router, there are several ways to find out. The best source to determine this is your router manual. This should tell you if it is wireless or not. You could also check the website of the manufacturer of the router. Or, check to see if there is an antennae coming off the router.
More about: Online Connections
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